x+1/x^2=root 2 then find value of x^3 +1/x^3
experts plsn answer i have my exam tmr

It is given that,    x+1x=2We need to find the value of  x3+1x3Use the algebraic formula.     a+b3=a3+b3+3aba+bThis gives,   a3+b3=a+b3-3aba+bTake a= x  and b=1x  to get,  x3+1x3=x+1x3 +3x1x x+1x               =23 +31 2               =22+32               =52

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